TLDR: someone's trying to sell their version of cpufreq_ondemand to people who don't realise it's built in to the OS.
If anyone's wondering how they got their 30% power saved figure: their method for measuring power consumption without Granola starts "Set the operating system power settings to the High profile in the Power Options"[1] - in windows, which I'm guessing is going to disable the built-in frequency governor. Not exactly a fair comparison. They don't benchmark granola against ondemand on linux. Can't imagine why.
If anyone's wondering how they got their 30% power saved figure: their method for measuring power consumption without Granola starts "Set the operating system power settings to the High profile in the Power Options"[1] - in windows, which I'm guessing is going to disable the built-in frequency governor. Not exactly a fair comparison. They don't benchmark granola against ondemand on linux. Can't imagine why.
[1] http://grano.la/software/benchmark.php